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                  <input type="radio" name="logo_bg" value="color_7" id="logo_bg_7">
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			  </li>
			  <li class="drop-title"><p>头部</p></li>
			  <li class="drop-skin-li clearfix">
                <span class="inverse">
                  <input type="radio" name="header_bg" value="default" id="header_bg_1" checked>
                  <label for="header_bg_1"></label>                      
                </span>                                                    
                <span>                                                     
                  <input type="radio" name="header_bg" value="color_2" id="header_bg_2">
                  <label for="header_bg_2"></label>                      
                </span>                                                    
                <span>                                                     
                  <input type="radio" name="header_bg" value="color_3" id="header_bg_3">
                  <label for="header_bg_3"></label>
                </span>
                <span>
                  <input type="radio" name="header_bg" value="color_4" id="header_bg_4">
                  <label for="header_bg_4"></label>                      
                </span>                                                    
                <span>                                                     
                  <input type="radio" name="header_bg" value="color_5" id="header_bg_5">
                  <label for="header_bg_5"></label>                      
                </span>                                                    
                <span>                                                     
                  <input type="radio" name="header_bg" value="color_6" id="header_bg_6">
                  <label for="header_bg_6"></label>                      
                </span>                                                    
                <span>                                                     
                  <input type="radio" name="header_bg" value="color_7" id="header_bg_7">
                  <label for="header_bg_7"></label>
                </span>
                <span>
                  <input type="radio" name="header_bg" value="color_8" id="header_bg_8">
                  <label for="header_bg_8"></label>
                </span>
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			  <li class="drop-title"><p>侧边栏</p></li>
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                  <input type="radio" name="sidebar_bg" value="default" id="sidebar_bg_1" checked>
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                <span>
                  <input type="radio" name="sidebar_bg" value="color_2" id="sidebar_bg_2">
                  <label for="sidebar_bg_2"></label>
                </span>
                <span>
                  <input type="radio" name="sidebar_bg" value="color_3" id="sidebar_bg_3">
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                </span>
                <span>
                  <input type="radio" name="sidebar_bg" value="color_4" id="sidebar_bg_4">
                  <label for="sidebar_bg_4"></label>
                </span>
                <span>
                  <input type="radio" name="sidebar_bg" value="color_5" id="sidebar_bg_5">
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                </span>
                <span>
                  <input type="radio" name="sidebar_bg" value="color_6" id="sidebar_bg_6">
                  <label for="sidebar_bg_6"></label>
                </span>
                <span>
                  <input type="radio" name="sidebar_bg" value="color_7" id="sidebar_bg_7">
                  <label for="sidebar_bg_7"></label>
                </span>
                <span>
                  <input type="radio" name="sidebar_bg" value="color_8" id="sidebar_bg_8">
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                </span>
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              <span>笔下光年</span>
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        <div class="row">
          
          <div class="col-lg-12">
            <div class="card">
              <header class="card-header"><div class="card-title">输入框组</div></header>
              <div class="card-body">
                
                <div class="input-group mb-3">
                  <div class="input-group-prepend">
                    <span class="input-group-text" id="basic-addon1">@</span>
                  </div>
                  <input type="text" class="form-control" placeholder="用户名">
                </div>
                
                <div class="input-group mb-3">
                  <input type="text" class="form-control" placeholder="收件人的用户名">
                  <div class="input-group-append">
                    <span class="input-group-text" id="basic-addon2">@example.com</span>
                  </div>
                </div>
                
                <label for="basic-url">您的博客地址</label>
                <div class="input-group mb-3">
                  <div class="input-group-prepend">
                    <span class="input-group-text" id="basic-addon3">https://example.com/users/</span>
                  </div>
                  <input type="text" class="form-control" id="basic-url">
                </div>
                
                <div class="input-group mb-3">
                  <div class="input-group-prepend">
                    <span class="input-group-text">$</span>
                  </div>
                  <input type="text" class="form-control">
                  <div class="input-group-append">
                    <span class="input-group-text">.00</span>
                  </div>
                </div>
                
                <div class="input-group">
                  <div class="input-group-prepend">
                    <span class="input-group-text">文本区域</span>
                  </div>
                  <textarea class="form-control" aria-label="With textarea"></textarea>
                </div>
                <h6 class="mt-3">包装</h6>
                <p>默认情况下，输入组通过 <code>flex-wrap: wrap</code> 以便在输入组中容纳自定义表单字段验证，你可以使用以下命令禁用此功能 <code>.flex-nowrap</code>。</p>
                <div class="input-group flex-nowrap">
                  <div class="input-group-prepend">
                    <span class="input-group-text" id="addon-wrapping">@</span>
                  </div>
                  <input type="text" class="form-control" placeholder="用户名">
                </div>
                <h6 class="mt-3">规格尺寸</h6>
                <p>将相对表单大小的class样式加到 <code>.input-group</code> 中，其内容会自动调整大小，如 <code>.input-group-lg</code>、<code>.input-group-sm</code>，不需要在每个元素上重重使用样式控制其大小。</p>
                <div class="input-group input-group-sm mb-3">
                  <div class="input-group-prepend">
                    <span class="input-group-text" id="inputGroup-sizing-sm">Small</span>
                  </div>
                  <input type="text" class="form-control" aria-label="Small" aria-describedby="inputGroup-sizing-sm">
                </div>
                
                <div class="input-group mb-3">
                  <div class="input-group-prepend">
                    <span class="input-group-text" id="inputGroup-sizing-default">Default</span>
                  </div>
                  <input type="text" class="form-control" aria-label="Default" aria-describedby="inputGroup-sizing-default">
                </div>
                
                <div class="input-group input-group-lg">
                  <div class="input-group-prepend">
                    <span class="input-group-text" id="inputGroup-sizing-lg">Large</span>
                  </div>
                  <input type="text" class="form-control" aria-label="Large" aria-describedby="inputGroup-sizing-sm">
                </div>
                <h6 class="mt-3">复选框和单选框</h6>
                <p>在输入组的插件中放置任何复选框或单选七天，而不仅仅文本。</p>
                <div class="input-group mb-3">
                  <div class="input-group-prepend">
                    <div class="input-group-text">
                      <input type="checkbox" aria-label="Checkbox for following text input">
                    </div>
                  </div>
                  <input type="text" class="form-control" aria-label="Text input with checkbox">
                </div>
                
                <div class="input-group">
                  <div class="input-group-prepend">
                    <div class="input-group-text">
                    <input type="radio" aria-label="Radio button for following text input">
                    </div>
                  </div>
                  <input type="text" class="form-control" aria-label="Text input with radio button">
                </div>
                <h6 class="mt-3">多个输入</h6>
                <p>尽管可视化支持多个 <code>&lt;input&gt;</code> 但验证样式仅适用于具有单个 <code>&lt;input&gt;</code> 的输入组。</p>
                <div class="input-group">
                  <div class="input-group-prepend">
                    <span class="input-group-text" id="">First and last name</span>
                  </div>
                  <input type="text" class="form-control">
                  <input type="text" class="form-control">
                </div>
                <h6 class="mt-3">多类型控件组合</h6>
                <p>支持多种控件结合，比如复选框和、文本、input框混合使用。</p>
                <div class="input-group mb-3">
                  <div class="input-group-prepend">
                    <span class="input-group-text">$</span>
                    <span class="input-group-text">0.00</span>
                  </div>
                  <input type="text" class="form-control" aria-label="Amount (to the nearest dollar)">
                </div>
                
                <div class="input-group">
                  <input type="text" class="form-control" aria-label="Amount (to the nearest dollar)">
                  <div class="input-group-append">
                    <span class="input-group-text">$</span>
                    <span class="input-group-text">0.00</span>
                  </div>
                </div>
                <h6 class="mt-3">按钮组合</h6>
                <div class="input-group mb-3">
                  <div class="input-group-prepend">
                    <button class="btn btn-outline-secondary" type="button">Button</button>
                  </div>
                  <input type="text" class="form-control" placeholder="" aria-label="" aria-describedby="basic-addon1">
                </div>
                
                <div class="input-group mb-3">
                  <input type="text" class="form-control" placeholder="收件人的用户名" >
                  <div class="input-group-append">
                    <button class="btn btn-outline-secondary" type="button">Button</button>
                  </div>
                </div>
                
                <div class="input-group mb-3">
                  <div class="input-group-prepend">
                    <button class="btn btn-outline-secondary" type="button">Button</button>
                    <button class="btn btn-outline-secondary" type="button">Button</button>
                  </div>
                  <input type="text" class="form-control" placeholder="">
                </div>
                
                <div class="input-group">
                  <input type="text" class="form-control" placeholder="收件人的用户名">
                  <div class="input-group-append">
                    <button class="btn btn-outline-secondary" type="button">Button</button>
                    <button class="btn btn-outline-secondary" type="button">Button</button>
                  </div>
                </div>
                <h6 class="mt-3">带下拉列表的按钮组合</h6>
                <div class="input-group mb-3">
                  <div class="input-group-prepend">
                    <button class="btn btn-outline-secondary dropdown-toggle" type="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">下拉菜单</button>
                    <div class="dropdown-menu">
                      <a class="dropdown-item" href="#!">庄子</a>
                      <a class="dropdown-item" href="#!">道德经</a>
                      <a class="dropdown-item" href="#!">菜根谭</a>
                      <div role="separator" class="dropdown-divider"></div>
                      <a class="dropdown-item" href="#!">牡丹亭</a>
                    </div>
                  </div>
                  <input type="text" class="form-control" aria-label="Text input with dropdown button">
                </div>
                
                <div class="input-group">
                  <input type="text" class="form-control" aria-label="Text input with dropdown button">
                  <div class="input-group-append">
                    <button class="btn btn-outline-secondary dropdown-toggle" type="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">下拉菜单</button>
                    <div class="dropdown-menu">
                      <a class="dropdown-item" href="#!">西厢记</a>
                      <a class="dropdown-item" href="#!">纳兰词</a>
                      <a class="dropdown-item" href="#!">楚辞</a>
                      <div role="separator" class="dropdown-divider"></div>
                      <a class="dropdown-item" href="#!">浮生六记</a>
                    </div>
                  </div>
                </div>
                <h6 class="mt-3">分裂式下拉与input组合</h6>
                <div class="input-group mb-3">
                  <div class="input-group-prepend">
                    <button type="button" class="btn btn-outline-secondary">书籍</button>
                    <button type="button" class="btn btn-outline-secondary dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                      <span class="sr-only">Toggle Dropdown</span>
                    </button>
                    <div class="dropdown-menu">
                      <a class="dropdown-item" href="#!">庄子</a>
                      <a class="dropdown-item" href="#!">道德经</a>
                      <a class="dropdown-item" href="#!">菜根谭</a>
                      <div role="separator" class="dropdown-divider"></div>
                      <a class="dropdown-item" href="#!">牡丹亭</a>
                    </div>
                  </div>
                  <input type="text" class="form-control" aria-label="Text input with segmented dropdown button">
                </div>
                
                <div class="input-group">
                  <input type="text" class="form-control" aria-label="Text input with segmented dropdown button">
                  <div class="input-group-append">
                    <button type="button" class="btn btn-outline-secondary">书籍</button>
                    <button type="button" class="btn btn-outline-secondary dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                      <span class="sr-only">Toggle Dropdown</span>
                    </button>
                    <div class="dropdown-menu">
                      <a class="dropdown-item" href="#!">西厢记</a>
                      <a class="dropdown-item" href="#!">纳兰词</a>
                      <a class="dropdown-item" href="#!">楚辞</a>
                      <div role="separator" class="dropdown-divider"></div>
                      <a class="dropdown-item" href="#!">浮生六记</a>
                    </div>
                  </div>
                </div>
                <h6 class="mt-3">自定义选择</h6>
                <div class="input-group mb-3">
                  <div class="input-group-prepend">
                    <label class="input-group-text" for="inputGroupSelect01">选项</label>
                  </div>
                  <select class="custom-select" id="inputGroupSelect01">
                    <option selected>请选择...</option>
                    <option value="1">One</option>
                    <option value="2">Two</option>
                    <option value="3">Three</option>
                  </select>
                </div>
                
                <div class="input-group mb-3">
                  <select class="custom-select" id="inputGroupSelect02">
                    <option selected>请选择...</option>
                    <option value="1">One</option>
                    <option value="2">Two</option>
                    <option value="3">Three</option>
                  </select>
                  <div class="input-group-append">
                    <label class="input-group-text" for="inputGroupSelect02">选项</label>
                  </div>
                </div>
                
                <div class="input-group mb-3">
                  <div class="input-group-prepend">
                    <button class="btn btn-outline-secondary" type="button">按钮</button>
                  </div>
                  <select class="custom-select" id="inputGroupSelect03">
                    <option selected>请选择...</option>
                    <option value="1">One</option>
                    <option value="2">Two</option>
                    <option value="3">Three</option>
                  </select>
                </div>
                
                <div class="input-group">
                  <select class="custom-select" id="inputGroupSelect04">
                    <option selected>请选择...</option>
                    <option value="1">One</option>
                    <option value="2">Two</option>
                    <option value="3">Three</option>
                  </select>
                  <div class="input-group-append">
                    <button class="btn btn-outline-secondary" type="button">按钮</button>
                  </div>
                </div>
                <h6 class="mt-3">自定义文件输入</h6>
                <div class="input-group mb-3">
                  <div class="input-group-prepend">
                    <span class="input-group-text">上传</span>
                  </div>
                  <div class="custom-file">
                    <input type="file" class="custom-file-input" id="inputGroupFile01">
                    <label class="custom-file-label" for="inputGroupFile01">选择文件</label>
                  </div>
                </div>
                
                <div class="input-group mb-3">
                  <div class="custom-file">
                    <input type="file" class="custom-file-input" id="inputGroupFile02">
                    <label class="custom-file-label" for="inputGroupFile02">选择文件</label>
                  </div>
                  <div class="input-group-append">
                    <span class="input-group-text" id="">上传</span>
                  </div>
                </div>
                
                <div class="input-group mb-3">
                  <div class="input-group-prepend">
                    <button class="btn btn-outline-secondary" type="button">按钮</button>
                  </div>
                  <div class="custom-file">
                    <input type="file" class="custom-file-input" id="inputGroupFile03">
                    <label class="custom-file-label" for="inputGroupFile03">选择文件</label>
                  </div>
                </div>
                
                <div class="input-group">
                  <div class="custom-file">
                    <input type="file" class="custom-file-input" id="inputGroupFile04">
                    <label class="custom-file-label" for="inputGroupFile04">选择文件</label>
                  </div>
                  <div class="input-group-append">
                    <button class="btn btn-outline-secondary" type="button">按钮</button>
                  </div>
                </div>
                
              </div>
            </div>
          </div>
          
        </div>
        
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